<template>
  <div class="app-container">
    讲师表单
    <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name"/>
      </el-form-item>
      <el-form-item label="讲师排序">
        <el-input-number v-model="teacher.sort" controls-position="right" min="0"/>
      </el-form-item>
      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level" clearable placeholder="请选择">
          <el-option :value="1" label="高级讲师"/>
          <el-option :value="2" label="首席讲师"/>
        </el-select>
      </el-form-item>
      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career"/>
      </el-form-item>
      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro" :rows="10" type="textarea"/>
      </el-form-item>

      <el-form-item>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate">保存</el-button>
      </el-form-item>
    </el-form>

  </div>
</template>
<script>
  import teacherApi from '@/api/edu/teacher'
  import ImageCropper from '@/components/ImageCropper'
  import PanThumb from '@/components/PanThumb'

  export default {
    components: { ImageCropper, PanThumb },
    data() {
      return {
        teacher:{
          name: '',
          sort: 0,
          level: 1,
          career: '',
          intro: '',
          avatar: ''
        },
        saveBtnDisabled:false  // 保存按钮是否禁用,
      }
    },
    created() { //页面渲染之前执行
      this.init()
    },
    watch: {  //监听
      $route(to, from) { //路由变化方式，路由发生变化，方法就会执行
        this.init()
      }
    },
    methods:{

      init() {
        //判断路径有id值,做修改
        if(this.$route.params && this.$route.params.id) {
          //从路径获取id值
          const id = this.$route.params.id
          //调用根据id查询的方法
          this.getInfo(id)
        } else { //路径没有id值，做添加
          //清空表单
          this.teacher = {}
        }
      },
      //根据讲师id查询的方法
      getInfo(id) {
        teacherApi.getTeacherInfo(id)
          .then(response => {
            this.teacher = response.data.teacher
          })
      },
      saveOrUpdate() {
        //判断修改还是添加
        //根据teacher是否有id
        if(!this.teacher.id) {
          //添加
          this.saveTeacher()
        } else {
          //修改
          this.updateTeacher()
        }
      },
      //修改讲师的方法
      updateTeacher() {
        teacherApi.updateTeacher(this.teacher)
          .then(response => {
            //提示信息
            this.$message({
              type: 'success',
              message: '修改成功!'
            });
            //回到列表页面 路由跳转
            this.$router.push({path:'/edu/table'})
          })
      },
      //添加讲师的方法
      saveTeacher() {
        teacherApi.addTeacher(this.teacher)
          .then(response => {//添加成功
            //提示信息
            this.$message({
              type: 'success',
              message: '添加成功!'
            });
            //回到列表页面 路由跳转
            this.$router.push({path:'/edu/table'})
          })
      }

    }
  }
</script>
